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Originally Posted by bighunter
Is running big oil basically the same as running a 18k unit? Ive tried reading other threads about this but still havent found a clear answer.
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nope. they do very different things. the 18k unit causes the HPOP system to run excessively high oil pressures ALL the time, whether the engine can benefit from it or not. But, when you really try to get horsepower out of the engine at WOT, full boost, you will still run into the pump limitations. The limitations cause the high pressure oil to fall off, which means teh injectors are using less then optimal pressures to operate.
Basically, the stock HPOP oil pump is almost always plenty of pump for stock engines. But, if you want to get more power out of the engine, eventuallly you will reach a point where teh stock HPOP can't pump any more fuel utilizing the stock injectors.
Big oil is adding pump capacity to the system. If you combine this with a good programmer, the programmer reads the throttle position, and cranks up the pressure off idle to give more throttle response midrange.
At WOT, Full boost, the big oil pump allows the injectors to continue injecting at 3000 psi like they were designed to. This allows better atomization and more power and potentially less heat.